Dynamic crew configuration recommendations for emergency medical services

Publications Category :

Author(s): Setareh Darvishi, Laila Cure, Paul Misasi

Project Description : Emergency Medical Services (EMS) face uncertainty regarding how to staff ambulances most effectively. The standard practice requires a minimum of two crew members per ambulance. However, the optimal certification for each of these two crew members remains unresolved. Should both be paramedics (homogeneous crews), or is paramedic-EMT (heterogeneous crew) beneficial without increasing paramedic workload? We develop two mixed integer optimization models to enhance workload balance in EMS staffing in a dynamic manner. The initial plan recommends crew configurations that minimize the maximum workload of paramedics using forecasted, acuity-stratified call volumes. The adjusted plan adapts these recommendations when new information becomes available such as staff no-shows. The initial plan’s performance is benchmarked against current practice. The adjusted plan is compared with a baseline that retains initial configurations but closes the anticipated least-busy station (the one with the lowest forecasted demand) during shortages. Results show that the proposed approach significantly reduces maximum paramedic workload. The framework is evaluated using 9-1-1 dispatch data from Sedgwick County EMS.

Additional Informational : Presented at IISE Annual Conference & Expo 2026, Arlington, TX, May 16-19, 2026